Chen Xu
YOU?
Author Swipe
View article: Filterless frequency 32-tupling millimeter ROF system without bit walk-off effect by Mach-Zehnder modulators
Filterless frequency 32-tupling millimeter ROF system without bit walk-off effect by Mach-Zehnder modulators Open
A novel scheme to generate a frequency 32-tripling millimeter wave (MMW) and transmit it over fiber without the bit walk-off effect is proposed. The operation principle and feasibility of our proposed scheme are theoretically analyzed and …
View article: Broadband microwave electric field measurement based on a planar dipole antenna as the local oscillator source
Broadband microwave electric field measurement based on a planar dipole antenna as the local oscillator source Open
We propose a superheterodyne microwave electric field measurement scheme based on Rydberg atoms that utilizes a planar dipole antenna as the local oscillator source. By designing a two-dimensional asymmetric dipole antenna, broadband micro…
View article: Collaborative Robotic Finishing Platform for Metal Part Processing Towards Industry 5.0
Collaborative Robotic Finishing Platform for Metal Part Processing Towards Industry 5.0 Open
Manual finishing operations in aerospace and ground transportation industries are often associated with health-and-safety-related issues such as musculoskeletal disorders, productivity loss, and challenges in workforce renewal. This work p…
View article: Metapocket: A Tri-Band Flexible Metasurface for Smartphone Antenna Performance Enhancement
Metapocket: A Tri-Band Flexible Metasurface for Smartphone Antenna Performance Enhancement Open
In this paper, a flexible tri-band reflective metasurface, the metapocket, is presented to work with smartphone antennas to enhance its realized gain, and radiation efficiency and reduce its Specific Absorption Rate (SAR). Considering the …
View article: Beyond Single-Point Judgment: Distribution Alignment for LLM-as-a-Judge
Beyond Single-Point Judgment: Distribution Alignment for LLM-as-a-Judge Open
LLMs have emerged as powerful evaluators in the LLM-as-a-Judge paradigm, offering significant efficiency and flexibility compared to human judgments. However, previous methods primarily rely on single-point evaluations, overlooking the inh…
View article: Transferable Adversarial Attacks on Black-Box Vision-Language Models
Transferable Adversarial Attacks on Black-Box Vision-Language Models Open
Vision Large Language Models (VLLMs) are increasingly deployed to offer advanced capabilities on inputs comprising both text and images. While prior research has shown that adversarial attacks can transfer from open-source to proprietary b…
View article: Design, Simulation and Measurement of Metapocket: An All-Textile Reflective Metasurface for On-Body Smartphone Radiation Improvement
Design, Simulation and Measurement of Metapocket: An All-Textile Reflective Metasurface for On-Body Smartphone Radiation Improvement Open
A polarization-independent all-textile reflective metasurface – the metapocket, is presented in this paper. This design aims at enhancing gain, and radiation efficiency and reducing the Specific Absorption Rate (SAR) of a smartphone antenn…
View article: Act in Collusion: A Persistent Distributed Multi-Target Backdoor in Federated Learning
Act in Collusion: A Persistent Distributed Multi-Target Backdoor in Federated Learning Open
Federated learning, a novel paradigm designed to protect data privacy, is vulnerable to backdoor attacks due to its distributed nature. Current research often designs attacks based on a single attacker with a single backdoor, overlooking m…
View article: Understanding Large Language Models in Your Pockets: Performance Study on COTS Mobile Devices
Understanding Large Language Models in Your Pockets: Performance Study on COTS Mobile Devices Open
As large language models (LLMs) increasingly integrate into every aspect of our work and daily lives, there are growing concerns about user privacy, which push the trend toward local deployment of these models. There are a number of lightw…
View article: Use of Recitation Input to Improve Students Writing
Use of Recitation Input to Improve Students Writing Open
In learning English, English writing is an important way to cultivate students' innovative thinking and pragmatic ability, and it is also one of the ways to test the results of English teaching. Recitation is not only an important way of l…
View article: A Novel Inserting Pilot Radio over Fiber System without the Bit Walk-Off Effect for the Generation and Distribution of Frequency 16-Tupling Millimeter Waves by Mach–Zehnder Modulators
A Novel Inserting Pilot Radio over Fiber System without the Bit Walk-Off Effect for the Generation and Distribution of Frequency 16-Tupling Millimeter Waves by Mach–Zehnder Modulators Open
A novel inserting pilot scheme to generate and distribute a frequency 16-tupling millimeter wave (MMW) radio over fiber (ROF) system without the bit walk-off effect via Mach–Zehnder modulators (MZMs) is proposed. The operation principle is…
View article: Beyond Traditional Threats: A Persistent Backdoor Attack on Federated Learning
Beyond Traditional Threats: A Persistent Backdoor Attack on Federated Learning Open
Backdoors on federated learning will be diluted by subsequent benign updates. This is reflected in the significant reduction of attack success rate as iterations increase, ultimately failing. We use a new metric to quantify the degree of t…
View article: Research on the Path of Digital Technology Empowering Teaching Reform in Japanese Majors in Chinese Universities---A Case Study of ZYU
Research on the Path of Digital Technology Empowering Teaching Reform in Japanese Majors in Chinese Universities---A Case Study of ZYU Open
With the rapid development of information technology, the application of digital technology in foreign language teaching is becoming increasingly widespread. Driven by the Chinese government’s policies on education digitalization, Japanese…
View article: Beyond Traditional Threats: A Persistent Backdoor Attack on Federated Learning
Beyond Traditional Threats: A Persistent Backdoor Attack on Federated Learning Open
Backdoors on federated learning will be diluted by subsequent benign updates. This is reflected in the significant reduction of attack success rate as iterations increase, ultimately failing. We use a new metric to quantify the degree of t…
View article: Progression Cognition Reinforcement Learning With Prioritized Experience for Multi-Vehicle Pursuit
Progression Cognition Reinforcement Learning With Prioritized Experience for Multi-Vehicle Pursuit Open
Multi-vehicle pursuit (MVP) such as autonomous police vehicles pursuing suspects is important but very challenging due to its mission and safety-critical nature. While multi-agent reinforcement learning (MARL) algorithms have been proposed…
View article: Cooperative Resource Allocation for Hybrid NOMA-OMA-Based Wireless Powered MC-IoT Systems with Hybrid Relays
Cooperative Resource Allocation for Hybrid NOMA-OMA-Based Wireless Powered MC-IoT Systems with Hybrid Relays Open
This paper considers an uplink wireless powered multichannel internet of things (MC-IoT) system with multiple hybrid relays, each serves a group of wireless-powered IoTDs. For coordinating radio frequency wireless power transfer (RF-WPT) a…
View article: Proteomic Characterization Identifies Clinically Relevant Subgroups of Gastrointestinal Stromal Tumors
Proteomic Characterization Identifies Clinically Relevant Subgroups of Gastrointestinal Stromal Tumors Open
Gastrointestinal stromal tumor (GIST) is the most common mesenchymal tumor of the gastrointestinal tract, and it has high metastatic and recurrence rates. We aimed to characterize the proteomic features of GIST to understand biological pro…
View article: Benefit Analysis and Comparison of Electric Heating System for Municipal Central Heating
Benefit Analysis and Comparison of Electric Heating System for Municipal Central Heating Open
Electric heating can not only relieve the pressure of municipal central heating but also help to solve the problem of wind and light abandonment, which is an important direction for the future development of central heating. To maximize th…
View article: A novel method to generate and transmit 40-tupling frequency millimeter wave over fiber based on remodulation of MZMs
A novel method to generate and transmit 40-tupling frequency millimeter wave over fiber based on remodulation of MZMs Open
An novel method to generate 40-tupling frequency millimeter (MMW) based on the remodulation of MZMs and a novel radio over fiber (ROF) system to transmit the generated MMW are proposed. At the central station (CS), the ±4th order sidebands…
View article: Study on the Construction of Ideological and Political Teaching Teams in Private Universities Based on Learning Community Theory
Study on the Construction of Ideological and Political Teaching Teams in Private Universities Based on Learning Community Theory Open
This essay examines the potential of learning community theory in enhancing the construction of ideological and political teaching teams in private universities. In the new era, private universities face unique challenges in fostering a st…
View article: Energy‐Efficient Resource Scheduling and Computation Offloading Strategy for Solar‐Powered Agriculture WSN
Energy‐Efficient Resource Scheduling and Computation Offloading Strategy for Solar‐Powered Agriculture WSN Open
IoT‐based smart agriculture plays a significant role in building a high‐yield, sustainable, and intelligent modern agriculture. However, limited battery capacity and low‐power processors of sensors cannot accommodate the exponential expans…
View article: Energy Management Model of Intelligent Park Based on Improved Depth Deterministic Gradient Strategy Algorithm
Energy Management Model of Intelligent Park Based on Improved Depth Deterministic Gradient Strategy Algorithm Open
The traditional distribution automation system, demand side management system, and distributed generation access and control system, respectively, solve the problems of regional distribution network power supply, customer power consumption…
View article: Learning Proximal Operator Methods for Massive Connectivity in IoT Networks
Learning Proximal Operator Methods for Massive Connectivity in IoT Networks Open
Grant-free random access has the potential to support massive connectivity in Internet of Things (IoT) networks, where joint activity detection and channel estimation (JADCE) is a key issue that needs to be tackled. The existing methods fo…
View article: Peer Review #1 of "Prevalence of depression and its associated factors among adolescents in China during the early stage of the COVID-19 outbreak (v0.1)"
Peer Review #1 of "Prevalence of depression and its associated factors among adolescents in China during the early stage of the COVID-19 outbreak (v0.1)" Open
Background:The outbreak of the 2019 coronavirus disease pandemic (COVID-19) had a detrimental impact on adolescents' daily life and studying, which could increase the risk of depression.This study examined the prevalence of depressive symp…
View article: Peer Review #2 of "Prevalence of depression and its associated factors among adolescents in China during the early stage of the COVID-19 outbreak (v0.2)"
Peer Review #2 of "Prevalence of depression and its associated factors among adolescents in China during the early stage of the COVID-19 outbreak (v0.2)" Open
Background:The outbreak of the 2019 coronavirus disease pandemic (COVID-19) had a detrimental impact on adolescents' daily life and studying, which could increase the risk of depression.This study examined the prevalence of depressive symp…
View article: Peer Review #2 of "Prevalence of depression and its associated factors among adolescents in China during the early stage of the COVID-19 outbreak (v0.1)"
Peer Review #2 of "Prevalence of depression and its associated factors among adolescents in China during the early stage of the COVID-19 outbreak (v0.1)" Open
Background:The outbreak of the 2019 coronavirus disease pandemic (COVID-19) had a detrimental impact on adolescents' daily life and studying, which could increase the risk of depression.This study examined the prevalence of depressive symp…
View article: Peer Review #1 of "Prevalence of depression and its associated factors among adolescents in China during the early stage of the COVID-19 outbreak (v0.2)"
Peer Review #1 of "Prevalence of depression and its associated factors among adolescents in China during the early stage of the COVID-19 outbreak (v0.2)" Open
Background:The outbreak of the 2019 coronavirus disease pandemic (COVID-19) had a detrimental impact on adolescents' daily life and studying, which could increase the risk of depression.This study examined the prevalence of depressive symp…